<?php
namespace TYPO3\CMS\Install\Configuration\Image;

/*
 * This file is part of the TYPO3 CMS project.
 *
 * It is free software; you can redistribute it and/or modify it under
 * the terms of the GNU General Public License, either version 2
 * of the License, or any later version.
 *
 * For the full copyright and license information, please read the
 * LICENSE.txt file that was distributed with this source code.
 *
 * The TYPO3 project - inspiring people to share!
 */

use TYPO3\CMS\Install\Configuration;

/**
 * Preset for ImageMagick version 6 or higher
 */
class ImageMagick6Preset extends AbstractImagePreset implements Configuration\PresetInterface {

	/**
	 * @var string Name of preset
	 */
	protected $name = 'ImageMagick6';

	/**
	 * @var int Priority of preset
	 */
	protected $priority = 70;

	/**
	 * @var array Configuration values handled by this preset
	 */
	protected $configurationValues = array(
		'GFX/image_processing' => 1,
		'GFX/im' => 1,
		// im_path and im_path_lzw are determined and set by path lookup methods
		'GFX/im_path' => '',
		'GFX/im_path_lzw' => '',
		'GFX/im_version_5' => 'im6',
		'GFX/im_v5effects' => 1,
		'GFX/im_mask_temp_ext_gif' => 1,
		'GFX/colorspace' => 'sRGB',
	);

	/**
	 * Find executable in path, wrapper for specific ImageMagick/GraphicsMagick find methods.
	 *
	 * @param array $searchPaths
	 * @return mixed
	 */
	protected function findExecutableInPath(array $searchPaths) {
		return $this->findImageMagick6InPaths($searchPaths);
	}

	/**
	 * Search for GraphicsMagick executables in given paths.
	 *
	 * @param array $searchPaths List of paths to search for
	 * @return bool TRUE if graphics magick was found in path
	 */
	protected function findImageMagick6InPaths(array $searchPaths) {
		$result = FALSE;
		foreach ($searchPaths as $path) {
			if (TYPO3_OS === 'WIN') {
				$executable = 'identify.exe';
			} else {
				$executable = 'identify';
			}
			if (@is_file($path . $executable)) {
				$command = escapeshellarg($path . $executable) . ' -version';
				$executingResult = FALSE;
				\TYPO3\CMS\Core\Utility\CommandUtility::exec($command, $executingResult);
				// First line of exec command should contain string GraphicsMagick
				$firstResultLine = array_shift($executingResult);
				// Example: "Version: ImageMagick 6.6.0-4 2012-05-02 Q16 http://www.imagemagick.org"
				if (strpos($firstResultLine, 'ImageMagick') !== FALSE) {
					list(,$version) = explode('ImageMagick', $firstResultLine);
					// Example: "6.6.0-4"
					list($version) = explode(' ', trim($version));
					if (version_compare($version, '6.0.0') >= 0) {
						$this->foundPath = $path;
						$result = TRUE;
						break;
					}
				}
			}
		}
		return $result;
	}

}
